Cross Connection Practice Exam

If shutoff number one is leaking during the first test of a Pressure Vacuum Breaker Assembly, which test cock can be used to divert water?

1. Test cock #2

2. Test cock #3

3. Test cock #1

4. Bypass valve

The correct answer is: Test cock #1

In the context of a Pressure Vacuum Breaker Assembly (PVBA), understanding the purpose and function of the test cocks is crucial. The test cocks are access points used for testing the assembly and diagnosing any issues. If shutoff number one is leaking, it suggests that water is inadvertently bypassing the desired path due to the leak, which could affect the integrity of the pressure vacuum breaker. Test cock #1 is directly connected to the first shutoff valve, thus allowing for monitoring and management of the water flow in that circuit. By using Test cock #1, you can effectively divert or contain the water, as it gives direct access to the water line before it reaches the leaking shutoff. This helps control the water flow, facilitating necessary repairs or further testing without allowing water to create additional issues elsewhere in the system. Utilizing other options, such as Test cock #2 or Test cock #3, may not provide the same level of control because they are connected to different parts of the assembly, which wouldn't effectively isolate or manage the leak from shutoff number one. The bypass valve itself is not a viable option for diverting water in this specific testing scenario about the first shutoff valve. In summary, Test cock #1 is the most